Add BMGD-native workflow-status and create-tech-spec workflows,
replacing all BMM references with BMGD paths.
## New Workflows
### workflow-status
- Multi-mode status checker for game projects
- Game-specific project levels (Game Jam → AAA)
- Workflow paths: gamedev-greenfield, gamedev-brownfield,
quickflow-greenfield, quickflow-brownfield
- Init workflow for new game project setup
### create-tech-spec
- Game-focused spec engineering workflow
- Engine-aware (Unity/Unreal/Godot)
- Performance and gameplay feel considerations
## Agent Updates
Updated all BMGD agents to reference BMGD workflows:
- game-architect, game-designer, game-dev, game-qa,
game-scrum-master, game-solo-dev
All agents now use /bmad:bmgd:workflows instead of /bmad:bmm:workflows
Scott Jennings